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Development of a New Nondestructive Inspection Strategy for Corroded Multistrand Anchor Cables

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Technical Report

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U.S. Army Engineer Research and Development Vicksburg United States

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This Coastal and Hydraulics Technical Note CHETN describes recent efforts undertaken to develop a nondestructive test NDT method to detect and locate broken in situ wires within seven-strand post-tension cables used in multistrand anchor systems. While broken wire detection is pursued here as an easier first step, characterization of cross-sectional losses within a cable due to corrosion is the ultimate goal of the cable NDT research. This need was described in the initial project publication Technical Note ERDCCHL CHETN-IX-28 Ebeling et al. 2012 and is part of a broader research effort under the work unit Probabilistic Assessment of the Reduced Capacity of Multistrand Post Tensioned Ground Anchorage due to Tendon Corrosion. Highlights from the NDT research component of that effort are briefly introduced in the INITIAL GUIDED WAVE INVESTIGATIONS section of this technical note additional findings and background information are presented in reports by Ebeling et al. 2013 and Haskins et al. 2014.

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